During the operation of monorail trains,the rigid contact between the pantograph and the catenary would cause vibration,which would reduce the quality and life of the pantograph and catenary.For this reason,an active control strategy based on a robust H∞ controller was proposedto improve pantograph-catenary relationship.A two-degree-of-freedom dynamic model of the pantograph-catenary coupling and a DC motor model were established for monorail trains.At different speeds of 60 km/h and 80 km/h,the magnitude of the contact force under passive control and active control and the response time controlled by active motor were analyzed.The experimental results show that the control strategy reduces the standard deviation of contact force by 9% and 8% at the speeds of 60 km/h and 80 km/h.It can also meet the adjustment requirements of contact force under high-speed operation,which can significantly reduce the contact force fluctuations and increase the service life of the pantograph-catenary.